Alert archive / Louisiana / Grant Parish
Weather alerts in Grant Parish, Louisiana, 2021
116 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Grant Parish and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 116
- Warnings
- 17
- Watches
- 16
- Advisories
- 38
- Busiest month
- April21 alerts
- Busiest day
- October 27, 20217 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Grant Parish, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 6 | 33% | 2 | 100% | 31 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 36 | 16 | 56% | 35 | 74% | 17 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 221 | 135 | 39% | 359 | 71% | 22 min |
| NWS Shreveport, LA: flash flood warnings | 34 | 19 | 44% | 83 | 82% | 129 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 10, 2:55 AM CST | Winter Storm Warning | SHV | 29 hr |
| Jan 10, 2:55 AM CST | Winter Weather Advisory | SHV | 29 hr |
| Jan 11, 9:20 PM CST | Freezing Fog Advisory | SHV | 12 hr |
| Jan 14, 9:11 PM CST | Lake Wind Advisory | SHV | 21 hr |
| Jan 31, 3:32 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Feb 11, 3:26 PM CST | Winter Weather Advisory | SHV | 21 hr |
| Feb 12, 4:03 PM CST | Winter Storm Watch | SHV | 10 hr |
| Feb 13, 2:25 AM CST | Winter Storm Warning | SHV | 60 hr |
| Feb 13, 2:57 PM CST | Wind Chill Advisory | SHV | 69 hr |
| Feb 13, 6:01 PM CST | Hard Freeze Warning | SHV | 66 hr |
| Feb 15, 2:27 PM CST | Winter Storm Warning | SHV | 67 hr |
| Feb 17, 7:38 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 17, 10:53 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 18, 9:41 AM CST | Hard Freeze Warning | SHV | 24 hr |
| Feb 19, 9:11 AM CST | Hard Freeze Warning | SHV | 25 hr |
| Feb 19, 9:56 PM CST | Freezing Fog Advisory | SHV | 12 hr |
| Mar 16, 4:40 PM CDT | Special Weather Statement | SHV | 50 min |
| Mar 17, 2:45 AM CDT | Lake Wind Advisory | SHV | 40 hr |
| Mar 17, 11:35 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Mar 17, 12:57 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 17, 2:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 22, 2:12 AM CDT | Lake Wind Advisory | SHV | 24 hr |
| Mar 24, 9:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Mar 25, 2:41 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Mar 30, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 31, 3:27 AM CDT | Lake Wind Advisory | SHV | 16 hr |
| Apr 7, 12:38 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 7, 2:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 7, 3:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 7, 7:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Apr 9, 5:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 9, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 9, 7:55 PM CDT | Severe Thunderstorm Warning | SHV | 65 min |
| Apr 9, 9:32 PM CDT | Special Weather Statement | SHV | 58 min |
| Apr 9, 10:27 PM CDT | Severe Thunderstorm Warning | SHV | 40 min |
| Apr 10, 12:52 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 14, 5:17 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 14, 5:38 AM CDT | Severe Thunderstorm Warning | SHV | 41 min |
| Apr 15, 2:36 AM CDT | Special Weather Statement | LCH | 24 min |
| Apr 15, 3:00 AM CDT | Special Weather Statement | LCH | 45 min |
| Apr 16, 2:46 PM CDT | Special Weather Statement | SHV | 44 min |
| Apr 23, 2:00 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 23, 2:21 PM CDT | Lake Wind Advisory | SHV | 17 hr |
| Apr 23, 2:42 PM CDT | Flash Flood Watch | SHV | 15 hr |
| Apr 23, 5:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 23, 7:42 PM CDT | Special Weather Statement | SHV | 48 min |
| Apr 23, 8:30 PM CDT | Tornado Watch | SPC | 8 hr |
| May 2, 1:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 3, 3:08 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| May 4, 8:33 AM CDT | Mesoscale Discussion | SPC | 117 min |
| May 4, 10:52 AM CDT | Tornado Watch | SPC | 7 hr |
| May 4, 12:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 4, 12:48 PM CDT | Severe Thunderstorm Warning | SHV | 57 min |
| May 9, 5:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 9, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 9, 7:02 PM CDT | Special Weather Statement | SHV | 58 min |
| May 9, 7:22 PM CDT | Severe Thunderstorm Warning | SHV | 53 min |
| May 9, 8:05 PM CDT | Special Weather Statement | SHV | 55 min |
| May 10, 5:22 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 5:30 PM CDT | Special Weather Statement | SHV | 60 min |
| May 10, 8:13 PM CDT | Special Weather Statement | SHV | 47 min |
| May 11, 2:04 AM CDT | Flash Flood Watch | SHV | 24 hr |
| May 17, 1:56 PM CDT | Flash Flood Watch | SHV | 5 days |
| May 17, 2:55 PM CDT | Special Weather Statement | SHV | 65 min |
| Jun 7, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 7, 3:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 4:30 PM CDT | Special Weather Statement | SHV | 45 min |
| Jun 8, 2:12 PM CDT | Special Weather Statement | SHV | 63 min |
| Jun 13, 8:04 PM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| Jun 14, 3:06 AM CDT | Heat Advisory | SHV | 16 hr |
| Jun 15, 2:54 AM CDT | Heat Advisory | SHV | 16 hr |
| Jun 21, 6:16 PM CDT | Special Weather Statement | SHV | 59 min |
| Jun 21, 7:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 15, 4:46 PM CDT | Special Weather Statement | SHV | 29 min |
| Jul 16, 2:31 PM CDT | Special Weather Statement | SHV | 44 min |
| Jul 23, 2:33 PM CDT | Heat Advisory | SHV | 28 hr |
| Jul 24, 2:38 PM CDT | Heat Advisory | SHV | 28 hr |
| Jul 25, 2:11 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 26, 2:40 PM CDT | Heat Advisory | SHV | 28 hr |
| Jul 27, 2:18 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 28, 2:27 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 29, 1:58 PM CDT | Heat Advisory | SHV | 3 days |
| Jul 30, 3:07 AM CDT | Excessive Heat Warning | SHV | 64 hr |
| Aug 9, 2:55 AM CDT | Heat Advisory | SHV | 16 hr |
| Aug 9, 3:16 PM CDT | Special Weather Statement | SHV | 44 min |
| Aug 9, 7:04 PM CDT | Heat Advisory | SHV | 3 days |
| Aug 21, 2:07 AM CDT | Heat Advisory | SHV | 5 days |
| Aug 26, 3:53 AM CDT | Heat Advisory | SHV | 14 hr |
| Aug 27, 4:00 PM CDT | Tropical Storm Watch | SHV | 24 hr |
| Aug 28, 3:53 AM CDT | Flash Flood Watch | SHV | 41 hr |
| Aug 28, 4:04 PM CDT | Tropical Storm Warning | SHV | 30 hr |
| Aug 31, 3:03 PM CDT | Heat Advisory | SHV | 28 hr |
| Sep 2, 3:13 AM CDT | Heat Advisory | SHV | 16 hr |
| Oct 21, 2:03 AM CDT | Dense Fog Advisory | SHV | 8 hr |
| Oct 27, 7:55 AM CDT | Tornado Watch | SPC | 9 hr |
| Oct 27, 12:11 PM CDT | Special Weather Statement | SHV | 64 min |
| Oct 27, 12:29 PM CDT | Severe Thunderstorm Warning | SHV | 61 min |
| Oct 27, 1:15 PM CDT | Special Weather Statement | SHV | 60 min |
| Oct 27, 1:31 PM CDT | Special Weather Statement | SHV | 44 min |
| Oct 27, 1:39 PM CDT | Severe Thunderstorm Warning | SHV | 66 min |
| Oct 27, 3:07 PM CDT | Lake Wind Advisory | SHV | 52 hr |
| Nov 7, 5:01 AM CST | Dense Fog Advisory | SHV | 4 hr |
| Nov 11, 3:45 AM CST | Special Weather Statement | SHV | 60 min |
| Dec 2, 4:53 AM CST | Dense Fog Advisory | SHV | 5 hr |
| Dec 3, 3:41 AM CST | Dense Fog Advisory | SHV | 6 hr |
| Dec 6, 12:36 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Dec 6, 7:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Dec 6, 10:28 AM CST | Special Weather Statement | SHV | 47 min |
| Dec 6, 10:33 AM CST | Severe Thunderstorm Warning | SHV | 42 min |
| Dec 11, 1:36 AM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 11, 4:02 AM CST | Mesoscale Discussion | SPC | 118 min |
| Dec 11, 4:44 AM CST | Special Weather Statement | SHV | 61 min |
| Dec 23, 2:34 PM CST | Lake Wind Advisory | SHV | 36 hr |
| Dec 26, 3:49 AM CST | Dense Fog Advisory | SHV | 6 hr |
| Dec 28, 2:05 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Dec 29, 8:51 PM CST | Dense Fog Advisory | SHV | 14 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 9 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 23 |
| Flooding | |
| Flash Flood Watch | 4 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 15 |
| Cold | |
| Hard Freeze Warning | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Lake Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Freezing Fog Advisory | 2 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.